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= 1/2 × (keliling - (PQ+PS))
= 1/2 × (70 - (15+15))
= 1/2 × (70 - 30)
= 1/2 × (40)
= 20 cm
kemudian cari panjang OS
OS² = PS² - OP²
OS² = 15² - 9²
OS² = 225 - 81
OS² = 144
OS = √144
OS = 12 cm
kemudian cari panjang OR
OR² = SR² - OS²
OR² = 20² - 12²
OR² = 400 - 144
OR² = 256
OR = √256
OR = 16 cm
kemudian cari d₁ dan d₂
d₁ = OP + OR
= 9 + 16
= 25 cm
d₂ = OS + OQ
= 12 + 12
= 24 cm
kemudian cari luas layang layang
1/2 × d₁ × d₂
= 1/2 × 25 × 24
= 1/2 × 600
= 300 cm²
jadi, luas layang layang adalah 300 cm²
sekian dan terima kasih....=)
ada nggak jawabannya di pilihan ganda?